Very cool. Looking forward to seeing a Kobo Touch with colour E-Ink and no glass substrate.

The cameraman interviewer on the other hand was an idiot. I felt sorry for the poor guy trying to answer his questions. I mean seriously... MICRO ANTS? The guy should have been given an atomic wedgie, had his camera taken away and somebody who was actually competent do the interview.

He says the colour filter takes up no more power for eINK. I wonder how that works.. As surely there's some kind of switching working there to activvate the various colour filters?
Wouldn't that require an electrical charge?
Is it maybe the charge required to do this is a lot lower that the charge required to change the eINK display itself?

You wouldn't need to switch anything to display different colours.
Each pixel is divided to four subpixels which are each behind a different colour filter (R,G,B,W).
For each subpixel you can set 16 different grey levels, which after going through the colour filter are 16 different colour intensity levels.
Since the 4 subpixels are very close together, you see each such quartet as one pixel and the colours mix up to create a compound colour. 16 by the power of 3 (RGB) plus the W for intensity gives you 4096 colours in 16 levels of intensity.